#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2019 crane <crane@gosun>
#
# Distributed under terms of the MIT license.

"""

"""

# ------------------- a() ---------------------
def a():
    print("[a] enter")
    a1()
    a2()
    print("[a] exit")

def a1():
    print("[a1] enter")
    print("[a1] exit")

def a2():
    print("[a2] enter")
    print("[a2] exit")

# ------------------- b() ---------------------
def b():
    print("[b] enter")
    print("[b] exit")

def b1():
    print("[b1] enter")
    print("[b1] exit")

def b2():
    print("[b2] enter")
    print("[b2] exit")

# ------------------- c() ---------------------
def c():
    print("[c] enter")
    print("[c] exit")


# ------------------- m() ---------------------
def main():
    print("[m] enter")
    a()
    b()
    c()
    print("[m] exit")

if __name__ == "__main__":
    main()
